Master naturalist Andy Raddatz will lead a discovery bird hike at Kohler-Andrae State Park at 9 a.m., Tuesday, Sept. 29.

Meet at the closed gate west of the host sites to walk to Friends Pond and hike the Ancient Dunes Trail while searching for birds. Wear comfortable shoes and dress for the weather. Bring insect repellant, sunscreen, binoculars and field guides, if available.

The 13/4-mile hike is best for those 8 and older — children must be accompanied by an adult.

Also at Kohler-Andrae, Ed Mindock will lead a one-hour program on collecting rocks at 2 p.m., Saturday, Oct. 3. Children must be accompanied by an adult. Meet at Sanderling Nature Center. No pets allowed.

All vehicles entering the park are required to have a vehicle admission sticker, either daily or annual. Stickers may be purchased at the park office at $7 for a daily or $25 for an annual pass.